DESCRIPTION

The function set_current_item sets the current item (the item on which
the menu cursor is positioned). current_item returns a pointer to the
current item in the given menu.

The function set_top_row sets the top row of the menu to show the given
row (the top row is initially 0, and is reset to this value whenever the
O_ROWMAJOR option is toggled). The item leftmost on the given row
becomes current. The function top_row returns the number of the top menu
row being displayed.

The function item_index returns the (zero-origin) index of item in
the menu's item pointer list.

RETURN VALUE

current_item returns a pointer (which may be NULL).
It does not set errno.

top_row and item_index return ERR (the general curses
error value) if their menu parameter is NULL.